JPH11287296A - Friction damping arrangement of torque transfer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a friction damping arrangement of a torque transfer device capable of improving the durability, in this friction damping arrangement belonging to the torque transfer device. SOLUTION: This friction damping arrangement is provided with a first inertial body 2 connected to a drive shaft and a second inertial body 4 relatively rotatably supported on this first inertial body 2. A frictional member 46 to be engaged with the second inertial body 4 at a specified play angle in the rotational direction is installed as well. Then a first spring member 47 forcibly pressing this frictional member 46 to the first inertial body is installed too. A force-pressing plate 48 to be engaged with the second inertial body 4 without any play in the rotational direction is installed. Moreover, a second spring member 49 forcibly pressing this force-pressing plate 48 to the frictional member 46 with a smaller spring force than the first spring member 47 is installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a friction damping device for a torque transmission device provided for an internal combustion engine, and more particularly to a friction damping device for a torque transmission device having two inertia bodies.

[0002]

2. Description of the Related Art As a friction damping device for a torque transmission device of this kind, for example, Japanese Patent Publication No. Hei 8-16501 discloses a first inertial body connected to a drive shaft and a relative rotation with respect to the first inertial body. A friction damping device is shown in communication with a torsional damper between a possibly supported second inertia body.

[0003] The friction damping device of the torque transmission device is composed of a low damping power damping device and a high damping power damping device in order to obtain a damping power corresponding to the magnitude of the transmission torque. These low damping power damping device and high damping power damping device are provided in connection with a torsional damper connecting the first inertial body and the second inertial body, and the torsion damper connected to the first inertial body is provided. It is formed by a friction member provided between the damper hub of the damper and the drive plate connected to the second inertia body.

In the low damping force damping device, a friction member is pressed by a spring member together with a pressing plate which engages with a drive plate without play, and frictionally contacts a damper hub to obtain a friction damping force. In the high damping device, the friction member is brought into frictional contact with the drive plate in a state where the friction member is engaged with the damper hub at a predetermined play angle in the rotating direction, thereby obtaining a friction damping force.

Accordingly, the first of the torque transmission devices is
When torque is transmitted from the inertial body to the second inertial body, the torsional damper and the friction damping device absorb and attenuate vibration superimposed on the transmitted torque. That is, the friction damping device exerts a friction damping capability by the relative rotation of the damper hub of the torsional damper and the drive plate, and attenuates the vibration superimposed on the transmission torque.

At this time, in the low torque region in which the friction member of the high damping device does not engage with the damper hub, the pressure plate and the pressing plate with which the friction member of the low damping device engages the drive plate without play. In the high torque region in which the friction member of the high damping device is engaged with the damper hub, the friction member engaged with the damper hub is driven by the frictional sliding between the damper hub and the low damping force. A high friction damping force is obtained by sliding on the plate.

[0007]

However, it is sufficient for the low damping device to exhibit its function in a low torque region. However, in the conventional example, the friction damping device has a low damping capability over the entire transmission torque range. It has been demonstrated. That is, the friction member of the low-damping-attenuating device exhibits the friction-damping capability in a low-torque region where the friction member of the high-damping-attenuating device does not engage with the damper hub. Even in a high torque region in which the friction member engages with the damper hub and exerts its function, the relative rotation between the damper hub and the drive plate causes
Friction sliding occurs between the damper hub and the pressing plate engaged with the drive plate.

For this reason, in the conventional example, there is a possibility that the friction damping device, particularly the friction member of the damping device having a low damping ability is worn out early and the durability is deteriorated.

The present invention has been devised in view of the above-mentioned conventional circumstances, and is a friction damping device attached to a torque transmission device, which is capable of improving the durability thereof. The purpose is to provide.

[0010]

SUMMARY OF THE INVENTION In view of the above, the first aspect of the present invention provides a first inertial body connected to a drive shaft and a second inertial body supported to be rotatable relative to the first inertial body. A friction damping device for a torque transmission device comprising:
A friction member that engages with one of the inertia body and the second inertia body at a predetermined play angle in the rotational direction, and a second member that presses the friction member against one of the other inertia bodies. A spring member, a pressing plate that engages the inertia body with which the friction member engages at a predetermined play angle without play in a rotational direction, and a pressing plate that is formed on the friction member with respect to the friction member as compared with the first spring member. And a second spring member that presses with a small spring force.

According to a second aspect of the present invention, there is provided a torque transmission including a first inertia body connected to a drive shaft and a second inertia body supported to be rotatable relative to the first inertia body. In a friction damping device of a device, a first friction member that engages with one of the first inertia body and the second inertia body at a predetermined play angle in a rotational direction, and the first friction member A spring member that presses against one of the other inertial bodies, and a first friction member and an inertial body with which the first friction member engages with a predetermined play angle. A second friction member having a friction coefficient smaller than that of one friction member.

In such a configuration, the torque applied to the drive shaft is input to a first inertia body connected to the drive shaft, and the second inertia body is connected to the second inertia body via a friction damping device.
It is transmitted to the inertial body. At this time, the friction damping device exerts a damping action.

Here, in the first aspect of the present invention,
The friction damping device operates as follows and exerts a damping action.

That is, the friction member of the friction damping device is engaged with one of the first inertia body and the second inertia body, for example, the second inertia body with a predetermined play angle, and the other inertia body is engaged. Since the friction member is pressed by the first spring member and is in frictional contact with the body, for example, the first inertia member, in a low torque region where the friction member is not engaged with the second inertia member, the friction member is in the first inertia state. It rotates together with the body and does not exhibit friction damping force.

On the other hand, the pressing plate is engaged with the second inertia body without play, and is pressed against the friction member by the second spring member having a spring force smaller than the spring force of the first spring member, thereby causing frictional contact. Therefore, in the low torque region in which the friction member is not engaged with the second inertia body, the friction member that rotates integrally with the first inertia body rotates integrally with the second inertia body. The frictional sliding is performed on the pressing plate to obtain a friction damping force.

At this time, since the pressing plate is pressed against the friction member by the second spring member having a smaller spring force than the first spring member, the pressing plate is obtained by sliding the friction member against the friction member. The friction damping force is small.

When the friction member engages with the second inertial body,
This friction member rotates integrally with the second inertial body, and
Friction sliding is performed on the inertial body to obtain a friction damping force.

At this time, the friction member is pressed by the first spring member having a larger spring force than the second spring member. The damping force is large.

Thus, the friction damping device of the torque transmitting device exhibits a friction damping force according to the magnitude of the transmitting torque.

Here, according to the first aspect of the present invention,
When the friction member is engaged with the second inertial body and frictionally slides on the first inertial body to exhibit high damping performance, the friction member rotates integrally with the second inertial body. Therefore, frictional sliding does not occur on the pressing plate engaged with the second inertia body without play. For this reason, since the friction member does not slide frictionally with respect to the pressing plate, early wear of the friction member is advantageously prevented.

According to the second aspect of the present invention, the friction damping device operates as follows to exhibit a damping action.

That is, the first friction member of the friction damping device is engaged with one of the first inertia body and the second inertia body, for example, the second inertia body at a predetermined play angle, and the other is engaged with the other. In the low torque region in which the first friction member is not engaged with the second inertia body, for example, the first inertia body is pressed by the spring member and is in frictional contact with the first inertia body.
The first friction member rotates integrally with the first inertial body,
It will not exhibit the friction damping force.

On the other hand, a second friction member having a friction coefficient smaller than that of the first friction member is provided between the first friction member and the second inertial body, and comes into frictional contact with the second inertial body. Therefore, in the low torque region in which the first friction member is not engaged with the second inertia body, the second friction member that rotates integrally with the first inertia body frictionally slides with the second inertia body. Move
Obtain friction damping force.

At this time, since the second friction member has a smaller friction coefficient than the first friction member, the friction damping obtained by the second friction member frictionally sliding with the second inertial body. The power is small.

When the first friction member engages with the second inertial body, the first friction member rotates integrally with the second inertial body and frictionally slides on the first inertial body. Get damping force.

At this time, since the first friction member has a larger friction coefficient than the second friction member, the friction damping obtained by the first friction member frictionally sliding with the first inertial body. Power is great.

Thus, the friction damping device of the torque transmission device exhibits a friction damping force according to the magnitude of the transmission torque.

Here, in the invention of claim 2,
When the first friction member engages with the second inertial body and frictionally slides on the first inertial body to exhibit high damping performance, the first friction member is integrated with the second inertial body. Rotate
The second friction member provided between the first friction member and the second inertia body does not slide on the second inertia body. For this reason, the second friction member does not frictionally slide with respect to the second inertial body, so that early wear of the second friction member is advantageously prevented.

Therefore, according to the first and second aspects of the present invention, there is provided a friction damping device attached to the torque transmitting device, and the friction damping device of the torque transmitting device capable of improving the durability. can get.

According to the third aspect of the present invention, in the first aspect of the invention, since the first spring member and the second spring member are disc springs, the friction damping device and the torque transmission are provided. Enlargement of the axial dimension of the entire device can be prevented.

According to the fourth aspect of the present invention, in the configuration of the second aspect of the present invention, since the spring member is a disc spring, the axial dimension of the entire friction damping device and torque transmitting device is reduced. The lengthening can be prevented.

[0032]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view of a torque transmission device to which the friction damping device of the present invention is applied, and FIG. 2 is a partial plan view of the torque transmission device shown in FIG. FIG. 3 is a drawing showing a second inertia body, an annular inertia body and a part of the drive plate cut away, and FIG. 3 is an enlarged view showing a main part of FIG. 1.

In FIG. 1, reference numeral 1 denotes a drive shaft, that is, a crankshaft of an internal combustion engine, and 2 denotes a first inertial body.
Are connected to the drive shaft 1 by bolts 3. Reference numeral 4 denotes a second inertial body rotatably supported by the first inertial body 2,
The second inertial body 4 can be connected to a clutch device (not shown). Reference numeral 5 denotes a torsional damper that connects the first inertial body 2 and the second inertial body 4 to each other.

The first inertial body 2 has a through hole 7 formed therein, and a recess 8 and an annular groove 9 continuous with the recess 8 are formed on the side facing the second inertial body 4. Thereby, an inner peripheral side rib 10a and an outer peripheral side rib 10b are formed. On the inner peripheral side of the outer peripheral rib 10b, an annular inertial body 11 is integrally attached facing the second inertial body 4 side. The annular inertia body 11 is attached to the first inertia body 2, thereby forming a part of the first inertia body 2 and covering a part of the recess 8 on the outer peripheral side. An auxiliary plate 12 is integrally mounted at a predetermined position in the depression 8. A ring gear 13 is fixed to the outer peripheral side of the first inertial body 2 by shrink fitting.

The second inertial body 4 includes an inner boss 15 and a plate 1 extending radially outward from the boss 15.
6, the inner peripheral side of the boss 15 is the first inertial body 2
And is rotatable with respect to the first inertial body 2.

The axial end of the boss 15 of the second inertial body 4 extends into an annular groove 9 formed in the first inertial body 2.
A plurality of axial projections 18 are formed at equal intervals in the circumferential direction at the axial end, and an engagement groove 19 is formed by these adjacent projections 18. Further, external teeth 20 are formed on the outer periphery of the boss 15 of the second inertial body 4.

The plate portion 16 of the second inertial body 4
Has a clutch sliding surface 21 with which a clutch disk of a clutch device (not shown) is in contact.

The torsion damper 5 for connecting the first inertial body 2 and the second inertial body 4 is provided facing the depression 8 of the first inertial body 2, and includes a damper hub 26 and a damper hub. 26, a pair of drive plates 27 disposed on both sides of the drive plate 26, the damper hub 26 and the drive plate 27.
Windows 28, 2 formed at positions corresponding to
9, the damper hub 26 and the drive plate 2
The main components are a pair of compression springs 30 that elastically connect the first and second springs 7 relatively rotatably, and an idler 31 that causes the pair of compression springs 30 to act in series.

The damper hub 26 is formed of an annular plate member, and has inner teeth 32 formed on the inner peripheral side thereof so as to be fitted to the outer teeth 20 formed on the second inertia body 4 and connected to be movable in the axial direction. In addition, on the outer peripheral side, a plurality of windows 28 opened to the outer peripheral side, four in this embodiment, are formed.

Windows 29 are respectively formed in the pair of drive plates 27 in correspondence with the windows 28 formed in the damper hub 26. Cut-and-raised tongue pieces 29a and 29b are formed at the inner peripheral end and the outer peripheral end of the window 29. The tongues 29a and 29b cover the outer periphery of the compression spring 30 so that the compression spring 30 is prevented from coming off.

The pair of drive plates 27 are integrated with each other via a rivet pin 37, and the rivet pin 37 is inserted into and fixed to the first inertial body 2 in the through hole 7 so as to form the first drive plate 27. It is integrally connected to the inertial body 2. The rivet pin 37 is connected to the damper hub 2.
6 can be engaged with a predetermined play angle in the torsional direction of the torsional damper 5.

As shown best in FIG. 2, the compression springs 30 are double nested compression springs, which are housed and arranged in corresponding windows 28 and 29, respectively. Further, retainers 38 are provided at both ends of the compression spring 30.

The idler 31 has an annular connecting portion 39 located on the outer periphery of the damper hub 26 and an arm portion 40 extending radially inward from the annular connecting portion 39. The arm portions 40 are windows 28, 29. A pair of compression springs 30 housed inside
, And a pair of compression springs 30
Operate in series in 29. Therefore, in this embodiment, when the damper hub 26 and the drive plate 27 rotate relatively, the four spring groups acting in series in the windows 28 and 29 act in parallel to obtain elasticity. .

Numeral 45 is a friction damping device for giving damping resistance to the relative rotation between the first inertial body 2 and the second inertial body 4. The friction damping device 45 is configured to engage with either the first inertia member 2 or the second inertia member 4, in this embodiment, the second inertia member 4 with a predetermined play angle in the rotational direction. A member 46, a first spring member 47 for pressing the friction member 46 against one of the other inertia bodies, that is, the first inertia body 2, and an inertia body for the friction member 46 to engage with a predetermined play angle; That is, a pressing plate 48 that engages with the second inertial body 4 without play in the rotating direction, and the pressing plate 48 is
And a second spring member 49 for pressing the second spring member 6.

The friction member 46 is formed by attaching an annular friction material 52 to both sides of an annular hub 51.
Are accommodated and arranged in an annular groove 9 formed in the groove. The hub 51 of the friction member 46 is formed in an annular shape from a plate member, and a projection 53 corresponding to the engagement groove 19 of the second inertial body 4 is formed on the inner peripheral side of the hub 51 inward in the radial direction. The projections 53 are engaged with the engagement grooves 19 of the second inertial body 4 with a predetermined gap in the rotation direction. Accordingly, the friction member 46 can be integrated with the second inertial body 4 when it exceeds a predetermined relative rotation angle in the rotation direction, and is connected to the second inertia body 4 so as to be relatively movable in the axial direction.

The first spring member 47 is formed of a disc spring, is disposed at the bottom of the annular groove 9 formed in the second inertial body 4, and presses the friction member 46 against the auxiliary plate 12 via the retainer 54. I have. Here, the auxiliary plate 12 is a first inertial body 2
And the first spring member 4
Reference numeral 7 indicates that the friction member 46 is pressed against the first inertial body 2.

The retainer 54 is formed with a bent tongue 55 in the axial direction, and the bent tongue 55 is engaged with an engagement hole 56 formed in the first inertial body 2. Thus, the retainer 54 is integrally connected to the first inertial body 2 without play in the rotation direction.

The pressing plate 48 is formed in a ring shape from a plate member, and a projection 57 corresponding to the engaging groove 19 of the second inertial body 4 is formed on the inner peripheral side of the pressing plate 48 inward in the radial direction. The projection 57 is provided in the engagement groove 19 of the second inertial body 4.
In the rotation direction without play. Therefore, the friction member 46 is connected to the second inertial body 4 such that there is no play in the rotation direction and the axis of movement is relatively movable.

The second spring member 49 is formed of a disc spring, and has a smaller spring force than the first spring member 47 so that the second spring member 49 has a lower spring force.
The pressing plate 48 is disposed between the inertial body 4 and the pressing plate 48, and presses the pressing plate 48 against the friction member 46 with a smaller spring force than the first spring member 47.

In such a configuration, the torque applied to the drive shaft 1 is input to the first inertial body 2 connected to the drive shaft 1, and the torsion damper 5 and the friction damping The power is transmitted to the second inertial body 4 via the device 45. Specifically, since the drive plate 27 of the torsion damper 5 is connected to the first inertia body 2 via the rivet pin 37 and the damper hub 26 is connected to the second inertia body 4 via the internal teeth 32, The torque input to the first inertial body 2 is applied to the drive plate 27 of the torsion damper, the compression spring 3
0 and to the second inertial body 4 via the damper hub 26.

At this time, since the pair of compression springs 30 accommodated in the windows 28 and 29 act in series, the spring constant is small, and the pair of compression springs 30 has a long bending amplitude and absorbs vibration.
The four spring groups acting in series act in parallel to obtain proper torsional elasticity. Further, the friction damping device 45 includes:
A friction plate 46 is engaged with the second inertial body 4 at a predetermined play angle, is in frictional contact with the first inertial body 2, and a pressing plate 48 engaged with the second inertial body 4 is a friction member. 4
6, the frictional member 46 frictionally slides between the first inertial body 2 and the second inertial body 4 to exhibit a damping action.

The friction damping device 45 operates in the following manner to exert a damping action.

That is, the friction member 4 of the friction damping device 45
6 are engaged with the second inertial body 4 at a predetermined play angle and are in frictional contact with the first inertial body 2 by being pressed by the first spring member 47.
In a state where the hub 5 is not engaged with the inertial body 4,
In a low torque region in which the projection 53 formed on the first inertia member 1 is not engaged with the engagement groove 19 of the second inertia body 4, the friction member 46 rotates integrally with the first inertia body 2, and the friction damping force is generated. Does not demonstrate.

On the other hand, the pressing plate 48 is engaged with the second inertia member 4 without play, and the second spring member 49 having a smaller spring force than the first spring member 47 with respect to the friction member 46.
The friction member 4
In a low torque region in which the second member 6 is not engaged with the second inertia member 4, the friction member 46 that rotates integrally with the first inertia member 2 is formed.
Is frictionally slid with respect to the pressing plate 48 which rotates integrally with the second inertial body 4 to obtain a friction damping force.

At this time, the pressing plate 48 is pressed against the friction member 46 by the second spring member 49 having a smaller spring force than the first spring member 47. The friction damping force obtained by sliding is small.

When the friction member 46 engages with the second inertial body 4, that is, the protrusion 53 formed on the hub 51 of the friction member 46
Is engaged with the engagement groove 19 of the second inertia member 4, the friction member 46 rotates integrally with the second inertia member 4, and frictionally slides with the first inertia member 2 to reduce friction. Get power.

At this time, the friction member 46 is pressed by the first spring member 47 having a larger spring force than the second spring member 49.
The frictional damping force obtained by friction sliding with respect to is large.

Thus, the friction damping device 45 of the torque transmitting device exerts a friction damping force according to the magnitude of the transmitted torque.

Here, the friction member 46 is connected to the second inertial body 4.
When the friction member 46 is engaged with the first inertial body 2 and exerts a high damping performance by friction sliding with the first inertial body 2, the friction member 46 rotates integrally with the second inertial body 4, so that the second inertial body 4 is rotated. There is no frictional sliding against the pressing plate 48 engaged with the body 4 without play. For this reason, the friction member 46 does not slide frictionally against the pressing plate 48, so that early wear of the friction member 46 is advantageously prevented.

Accordingly, a friction damping device 45 attached to the torque transmitting device and capable of improving the durability thereof can be obtained.

Further, since the first spring member 47 and the second spring member 49 are disc springs, it is possible to prevent the friction damping device 45 and the torque transmission device from increasing in axial dimension.

FIGS. 4 to 6 show another embodiment of the present invention. This embodiment is different from the above embodiment in that the friction damping device 45 is replaced by the first inertial body 2 or In this embodiment, any one of the second inertia bodies 4, a first friction member 61 that engages with the second inertia body 4 at a predetermined play angle in the rotation direction, and the first friction member 61 A spring member 62 pressing against one of the other inertia bodies, that is, the first inertia body 2, a first friction member 61, and a second friction member 61 engaged with the first friction member 61 at a predetermined play angle.
The second friction member 63 is provided between the inertial body 4 and has a smaller friction coefficient than the first friction member 61.

The first friction member 61 is formed by adhering an annular friction material 65 on both sides of an annular hub 64, and is accommodated in an annular groove 9 formed in the first inertial body 2. The hub 64 of the first friction member 61 is formed in an annular shape from a plate member, and the inner circumferential side of the hub 64 has an engagement groove 1 of the second inertial body 4.
9 are formed radially inward, and the projections 66 are respectively engaged with the engagement grooves 19 of the second inertial body 4 with a predetermined gap in the rotation direction.
Therefore, the first friction member 61 can be integrated with the second inertial body 4 when the rotation exceeds a predetermined relative rotation angle in the rotation direction, and is connected so as to be relatively movable in the axial direction. .

The spring member 62 is formed of a disc spring, is disposed at the bottom of the annular groove 9 formed in the second inertial body 4, and connects the first friction member 62 via the retainer 54 to the auxiliary plate 1.
2 is pressed. Here, since the auxiliary plate 12 is integrally attached to the first inertial body 2, the spring member 6
Reference numeral 2 indicates that the first friction member 62 is pressed against the first inertial body 2.

Further, a bent tongue 55 is formed on the retainer 54, and the bent tongue 55 is engaged with an engagement hole 56 formed in the first inertial body 2. The first inertial body 2 is integrally connected to the first inertia body 2 without play in the rotation direction.

The second friction member 63 includes the first friction member 6
The first inertial member 4 is formed in an annular shape from a friction material having a smaller coefficient of friction than the first friction material 65, and the first friction member 61 and the first friction member 61 are engaged with a predetermined play angle.
In this embodiment, the first friction member 61 is attached to the hub 64. That is, the friction material 65 adhered to the hub 64 of the first friction member 61
Among them, the friction material 65 located on the right side in FIG. 4 is formed to have a larger inner diameter than the friction material 65 located on the left side, and the second friction member 63 faces the inner peripheral side of the friction material 65 having the larger inner diameter. (See FIGS. 5 and 6).

Since other configurations are the same as those of the above-described embodiment, the same components are denoted by the same reference numerals, and redundant description will be omitted.

In such a configuration, the friction damping device 45 operates as follows to exhibit a damping action.

That is, the first friction member 61 of the friction damping device 45 is engaged with the second inertia body 4 at a predetermined play angle, and is pressed against the first inertia body 2 by the spring member 62. Since the first friction member 61 is in frictional contact, in a low torque region where the first friction member 61 is not engaged with the second inertia body 4, the first friction member 61 rotates integrally with the first inertia body 2, Does not exhibit friction damping force.

On the other hand, the second friction member 63 having a smaller coefficient of friction than the first friction member 61
1 and is in frictional contact with the second inertial body 4, in the low torque region where the first friction member 61 is not engaged with the second inertial body 4, The second friction member 63 that rotates integrally with the second friction member slides against the second inertial body 4 to obtain a friction damping force.

At this time, since the second friction member 63 has a friction coefficient smaller than that of the first friction member 61, the second friction member 63 slides against the second inertial body 4 by friction. The obtained friction damping force is small.

When the first friction member 61 engages with the second inertia member 4, that is, when the projection 66 formed on the hub 64 of the first friction member 61 engages with the engagement groove 19 of the second inertia member 4, The first friction member 61 rotates integrally with the second inertial body 4 and slides frictionally with the first inertial body 2 to obtain a friction damping force.

At this time, since the first friction member 61 has a friction coefficient larger than that of the second friction member 63, the first friction member 61 slides against the first inertial body 2 by friction. The obtained friction damping force is large.

Thus, the friction damping device 45 of the torque transmitting device exerts a friction damping force according to the magnitude of the transmitted torque.

Here, when the first friction member 61 engages with the second inertia member 4 and slides against the first inertia member 2 to exhibit a high damping ability, the first friction member 61 The first friction member 61 is rotated integrally with the second inertial body 4.
The second friction member 63 integrally attached to the second member does not frictionally slide with respect to the second inertial body 4. For this reason, the second friction member 63 does not slide on the second inertial body 4, so that early wear of the second friction member 63 is advantageously prevented.

Therefore, similarly to the above-described embodiment, in the present embodiment, the friction damping device 45 attached to the torque transmission device is used. A damping device 45 is obtained.

Further, since the spring member 62 is a disc spring, it is possible to prevent the friction damping device 45 and the entire torque transmitting device from increasing in axial dimension.

Although the embodiment has been described with reference to the drawings, the specific configuration is not limited to this embodiment and can be changed without departing from the gist of the invention.
For example, although the embodiment in which the drive plate 27 of the torsion damper 5 is disposed on both sides of the damper hub 26 has been described, a configuration in which the drive plate 27 is disposed on only one side may be employed.

[0080]

As described above in detail, according to the present invention, there is provided a friction damping device attached to a torque transmission device, the friction damping device of the torque transmission device being capable of improving its durability. can get.

[Brief description of the drawings]

FIG. 1 is a sectional view of a torque transmission device to which a friction damping device according to an embodiment of the present invention is applied.

FIG. 2 is a partial plan view showing a part of the torque transmission device shown in FIG. 1 with a part cut away, and an upper half showing a part with a second inertia body, an annular inertia body, and a part of a drive plate cut away; is there.

FIG. 3 is an enlarged view showing a main part of FIG. 1;

FIG. 4 is a view similar to FIG. 3, showing another embodiment of the present invention.

FIG. 5 is a plan view showing a first friction member and a second friction member.

FIG. 6 is a sectional view taken along line AOA of FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drive shaft 2 1st inertia body 3 2nd inertia body 4 Torsional damper 45 Friction damping device 46 Friction member 47 1st spring member 48 Press plate 49 2nd spring member

 ──────────────────────────────────────────────────の Continuing from the front page (72) Inventor Daisuke Shibata 1370 Onna, Atsugi-shi, Kanagawa Prefecture Inside Unisia Gex Co., Ltd. (72) Inventor Masato Ichinose 1370 Onna, Atsugi-shi, Kanagawa Prefecture In Unisia Gex Co., Ltd.

Claims (4)

[Claims] 1. A friction damping device for a torque transmission device comprising: a first inertia body connected to a drive shaft; and a second inertia body supported to be rotatable relative to the first inertia body. A friction member that engages with one of the first inertia body and the second inertia body with a predetermined play angle in the rotation direction, and presses this friction member against one of the other inertia bodies. A first spring member, a pressing plate that engages the inertia body with which the friction member engages at a predetermined play angle without play in a rotational direction,
A second spring member that presses with a smaller spring force than the spring member. 2. A friction damping device for a torque transmission device comprising: a first inertia body connected to a drive shaft; and a second inertia body supported to be rotatable relative to the first inertia body. A first inertial body that engages with one of the first inertial body and the second inertial body at a predetermined play angle in the rotational direction;
A friction member, a spring member that presses the first friction member against one of the other inertia bodies, and an inertia body that the first friction member engages with the first friction member at a predetermined play angle. And a second friction member having a smaller coefficient of friction than the first friction member. The friction damping device of the torque transmission device is provided. 3. The friction damping device for a torque transmission device according to claim 1, wherein the first spring member and the second spring member are disc springs. 4. The friction damping device for a torque transmission device according to claim 2, wherein said spring member is a disc spring.